[R] Question about survdiff in for-loop.
chocosando at daum.net
Fri Oct 19 09:02:05 CEST 2012
I have dataset composed of a numbers of survival analyses.
( for batch survival analyses by using for-loop) .
Here are code !!
Num<-Num_t # These are predictors !!
for (i in 1:Num )
survdiff(Surv(survival.m, survival) ~ names[i], data=svsv)
fit.Group<-survfit(Surv(survival.m, survival) ~ names[i] , data=svsv)
plot(fit.Group, col=2:1, xlab="Survival", ylab="Prob")
names[i] is not working in the survdiff.
According to help R , the predictor must be single subset.
And, names[i] is also single character, I think.
But, it do NOT work.
How I can solve this problem ?
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